Added info about script in README

Author: JosePizarro3

README.md

@@ -49,6 +49,11 @@ pip install coverage coveralls
 python -m pytest --cov=src
 ```
 
+You can also run the script to generate a local file `coverage.txt` with the same information by doing:
+```sh
+./scripts/generate_coverage_txt.sh
+```
+
 ## Development
 
 The plugin is still under development. If you would like to contribute, install the package in editable mode (with the added `-e` flag) with the development dependencies: